A method for manufacturing an absorbent article, includes: an arranging step of arranging elastic-member continuous bodies (35a) between a pair of mutually-opposing facing surfaces of a first-sheet-like-member continuous body that is continuous in the direction of transport, the elastic-member continuous bodies being stretched； a joining-portion forming step of forming joining portions (j) that joins the pair of facing surfaces to each other； a step of overlaying a second-sheet-like-member continuous body on the first-sheet-like-member continuous body and subsequently forming the side-seal section (SS) on each of two sides of each of cutting target positions (PC) in the direction of transport, these sheet-like-member continuous bodies being welded together in the side-seal section, the cutting target positions being set at a predetermined pitch in the direction of transport； a cutting step of producing the absorbent article (1) that has the elastic member (35) and the first and second sheet-like members, the cutting step being performed by cutting at each of the cutting target positions. In the joining-portion forming step, the joining portions are formed on two sides of the elastic-member continuous bodies in the CD direction while maintaining the elastic-member continuous bodies being stretched in the direction of transport. After the cutting step, the elastic member is expanded in the CD-direction, and is sandwiched and pressed by the joining portions on the two sides. As viewed in the thickness direction, at least a part of the joining portions are overlapped with a portion of the side-seal section.
